Machine for boring the bearings of crank cases



Dec. 21 ,1926. 1,611,570

A. H. WADELL.

MACHINE FORBORING THE BEARINGS OF CRANK CASES Filed May 28 192 4Sheets-$heet 1 IN VEN TOR.

7"", fwd; ATTO EYS.

A. H. WADELL MACHINE FOR BORING THE BEAR INGS 0E CRANK CASES Filed May28, 1924 4 Sheets-Sheet 2 b Dec; 21 19 6; 1,611,570

IN VEN TOR.

BYW

- fwd ATTO EYS.

Dec. 21 1926.

A. H. WADELL Filed May 28 1924 MACHINE FOR BO RING THE BEARINGS 0F CRANKQASES 4 Shets-Sheet 5 IN V EN TOR.

I AT my EYS.

Dec. 21 .1926. .1 1,611,570

' A. H. WADELL v MACHINE FOR BORING 'IHE BEARINGS OF CRANK CASES FiledMay 28, 1924 4 Sheets-Sheet. 4

I y I 1111111111 \1- k $1 ""mlm w H w) INVENTOR.

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A TO EYS.

' Patented Da ;21, 1926.

"UNITED STATES PATENT OFFICE.

ALBERT H. WADELL, NEWARK, NEW JERSEY.

Application filedMay as;

This invention relates to an improved portable machine for boring thebearings in crank cases of internal combustion engines and is adapted tosimultaneously here all the manually operable mechanism.

The invention is furtherdesigned to,pro-

vide amachine of this kind which is quickly attached or detached from acrank case and in which the boring mechanism can be quick- ;lyaligned'so that the operation is economir. so

cal as it *can be quickly done. The inventlon comprlsing an adjustablesupporting means'for the boring mechanism and a frame on, which all theparts are mounted, the' frame being readily attached and detached to andfrom the crank casing.

The invention is illustrated in the accompanymg drawings, in whichFigure 1 is a side View of the improved machine mounted on the upperhalf of a crank case and Figure 2 is a view of the boring bar of themachine detached and with the cutters removed.

Figure 3 is a longitudinal section taken through Figure 1 and Figure 4is a detail view of the preferred form of joint between the boring. barand its screw-threaded exten sion. Figure 5 is a cross section on an enlarged scale taken on line 55 in Figure .3. Figure 6 is a section takenon line 66 in Figure 3. Figure 7 is a section taken on line 7 7 inFigure 3 Figure 8 is an end view of the lower portion of the machineshowing a part of the crank case in section and Figure 9 is a crosssection on line 99 in Figure 7. Figure 10 is a longitudinal section onan enlarged scale of the boring bar and tool block therein. Figure 11 isa section on line 1111 in Figure 10, both Figures 10 and llshowing acalipering means which can beemployed in connection with the machine andFigures 12, 13, and 14 are views showing indicators for assisting in thealign ment of the bearings which support the hering bar. I v

The machine is used 'on the crankcase of an internal combustion engineand .in the drawing I show the member-:10 of a crank case which hasmounted thereon, the frame "formed of side rails or vslideways l1 andthe end ieces 12. The frame is detachably secure in place byclamps and Ishowthe clamps 13 which are forked at the end to engage the upper edgesof the rails 11 as at 14 in Figure 5 and to provide clearance at thecenter for the boring bar. The stem 15 1924. Serial no, 716,389.

of each clamp is shown secured by a nut 16" cylinder of the engine.bearings of the crank casevby means of a trated comprising a block 19(see Figure 6) which is clamped up tight against bottom edge of itsrespective side rail by a screw 20 so that the block 19 and the jaw 21on each side securely hold the slide in place. On the slide is a head 22in which the stem 23 of the bearing 24 slides. The screw bolt 25 isactuated by a handle26 and'is held against longitudinal movement by thecollar 27 between the flanges 28 and 29 of the screw bolt. The collar 27is made in halves so that it can be inserted between the flanges and isheld in place by the screws 30. The screw threaded part of the bolt 25engages the nut 31 of the stem 23 and moves it up and down when thescrew bolt is turned.

The bearings 24 are used in the desired number one for each bearing tobe bored, and I show three in the illustration. I

The bearings support the boring bar 32, which is equipped with asuitable handle 33 and has the required number'of tools for finishingthe inside of the bearings 34 of the crank case. For each hearing Iprovide a tool block 35 which is inserted in one of the slots 36 of thetool bar, the slot not being continuous in order. to give thebar therequired strength but they are extensive enough to make the wholeoperative length of the bar available so that the tools can be set up toat least fourbearings.

The block 35 fits loosely in the bar 32 and is fastened in its adjustedposition by the lock screws 37. The member 38 of the block 35 holds thetoolor cutter 39 which is ad justed by the screw 40 which moves the foot1 vtwo wings 44 pivoted to the post 45 and braced by the post 46 whenshut and locked by a suitable look as the pivoted bolt 47 and v the nut48.

In order to set the cutter I have devised a gauge 49 which fits underthe bar 32 and is secured to one arm of a-caliper or micrometer as by aset screw 50 and the distance from the line 51 to the centre of its are,which is the centre of the bar, being port-intermediate its ends andthen clamped others.

in place. The bearings 24 are then properly elevated .or depressed andwhen in place .canbe verified by an indicator such as the I one shown inFigure 12 in which the stem 53 fitting in the bearing 24 has therequired size indicator 54 to turn in the bearing to gauge its positionso as to line it.up with the able for different size crankcases. Theindicator 55is another type which is rotatable to gauge the fit'allaround. In Figure 14. I, show another form at 56 with a gauge 57 to showvariations, if any, from the concentric position. VVheIr properly set bythe han- .dles '26, the bearings 24 are fitted with the boring bar 32and the respective cutters 39 adjusted. When these have been adjustedthe members 44 of the nut are swung together and the handle 33 rotatedand the boring bar and cutters .are advanced when rotated and thebearings are all bored at the same time and in alignment. The jointbetween the bar 32 and the extension 43 is preferably flexible as thethreads on 43 are vfine and the stripping thereof isthereby avoided. Ishow the pins 58 and 59 set at The indicators 54 are interchange crankcases comprising a frame formed of side rails and cross pieces, meansfor detachebly securing the frame to a crank case, a boring bar,bearings for the bar, and heads for the bearings said heads beingadjustable longitudinally on the frame, and the bearings beingadjustable vertically in the heads. A boring machine for the bearings ofcrank cases comprisinga franie with longitudinal slide-ways thereon,slides on the slideways, means for locking the slides, heads on theslides, bearings adjustable vertically in the heads, a boring barinsertible iongtudinally in the bearings, and means for advancing thebar when it is rotated 3. A boring machine for the bearings of crankcases comprising a frame consisting of side rails andend plates, clampfor securing the frame to theupper member of a crank case, slidesmovable on the side rails, means for clamping the slides in place, the

slides including heads, hearings in the heads, screw bolts for elevatingand lowering the bearings, a boring .bar fitting in the bearings,cutters in the boring bar, and means for advancing the-boring. bar whenit is rotated.

In testimony that I claim the foregoing, I have hereto set my hand, this12th day of August, 192-3.

ALBERT WADELL

